时间：4月28日（星期一）上午 10:00
地点：硅材料国家重点实验室1号楼会议室
主讲人： Prof Guy Le Lay, Aix-Marseille University, France
题目：Elemental, graphene-like, artificial materials: silicene and germanene, novel 2D silicon and germanium allotropes
Abstract：Silicene, graphene’s cousin and germanene, a newcomer in Flatland, are predicted to share its extraordinary electronic properties associated with quasiparticles featuring massless Dirac fermions, and to a behave as two-dimensional topological insulators and possibly high temperature superconductors.
We synthesized single layer epitaxial silicene on silver (111) substrates, observed in situ as a beautiful “flower pattern” in Scanning Tunneling Microscopy and first described its hidden honeycomb atomic structure supported by DFT GGA-PBE calculations. We have also shown its linear electronic band dispersions obtained by synchrotron radiation Angle-Resolved PhotoElectron Spectroscopy and recently confirmed its metallic character.
We have got strong hints of the growth of epitaxial single layer germanene.
In this seminar, I will present fundamental results on these novel synthetic two-dimensional materials, which do not exist in nature, but which might open the way to practical applications, because of their expected direct compatibility with the current nano/micro electronic technologies.
Prof Guy Le Lay, Emeritus Professor at Aix-Marseille University, is a well known Physicist in Nanosciences. He is also an expert in Synchrotron Radiation, serving for eight years as a member of the European Round Table on Synchrotron Radiation and Free Electron Lasers. During his career, he has chaired and organized a number of international Schools, Workshops and Conferences (one about each second year in the last 20 years) and served in many UNESCO, NATO, EC, international, national and regional panels and expert committees. Lastly, Prof. Le Lay has been the French PI of the European Collaborative Project Two-Dimensional Nanolattices. He is especially working on silicene, which he discovered with his team in Marseille and published in a seminal paper in 2012. Currently he is Associate-Editor of the IOP journal “Two Dimensional Materials” .
欢迎各位老师和同学参加交流！
